Magnesium cement.



i MANN, a subject of the WILLIAM G. E. SIEGMANN, F E ALTIMORE, MARYLAND, ASSIGNOE T0 MhltY V. GAULT, 4 v GE B'EIMORE, MARYLAND. 4 i

maen'nsrunr cniunn'r.

Ho Drawing.

ToaZZ whom it may concern; 1

Be it known that 1, WILLIAM G. F. Smemany, and resident of Baltlmore, in the State of Maryland, United States of America, have invented certain new and useful Improvements in Magnesium Cement, of

' which the following is a specification.

This invention relates to the production of a .magnesium cement composition deslgned for use as building materials including substitutes for woodwork, flooring, trim- Y referred to under mings, insulations and a variety of other uses in connectlon with such buildings,

whereas it is furthermore adapted for the production of sidewalks, and in fact wherever a stonelike substance of modified qualities may be installed or employed. v I

This invention is an improvement on the invention set forth in Letters Patent numbered 1,102,358, issued to me July 7, 1914' in that the product resulting from the composition of matter to be claimed herein has qualities which are not inherent in the product resulting from the process set forth in the said patent, the particular character.-

istic of the productof the present invention being that it is fibrous without being hygroscopic in character, by which result it is possibleto penetrate the material with nails, screws or other securing devices without causing a fracture or disintegration of the said material, and said .productlwill not warp.

With the foregoing and other objects in.

view, the invention consists in the process of making magnesium cement, the same to be hereinafter more fully set forth and claimed.

In carrying out my invention, I form a dry powder produced by a mixture of magnesium oxid or equivalent oxid, magnesium sulfate, colophomum, common salt, lm'eselguhr, carbonate of barium and vegetable or from such vegetation as straw, thelike, to be hereinafter cork, sea grass or the comprehensive term fiber. The composition may be employed with suflicient water and carbon bi-sulfid to produce a plastic composition to be'molded in any desired shape or Em eror of Gen" which may be worked on Specification of Letters Patent. Pwimnfiagfl Jam, 16, 191%, Application filed May 10; 1916. serial No. 96,619.

to be spread as a coating for walls or other parts of a buildmg. Y 1

The purposes of the ingredients, the carbonate of barium, have been in the former patent and the result growing out of the introduction of carbonate of ba rium and other added ingredients has-been set forth herein. It will be noted in this connection that while .it has been, specified that oxid of magnesium is used, it is not the except stated purpose ofthe inventor to be limited the'reto, as oxid of zinc, oxid of calcium, oxid of alumina and other substituted for the oxid of magnesium as the invention contemplates any admixture in equivalent oxids may be which the gradual production of oxy-chlorid of magnesium is accomplished.

If it is desired to modify the hardening of the composition by retarding the formation of the chlorid, I may add calcined gypsum,'boric acid, powdered borax or other equivalent ingredient and asbestos may be employed in connection with the vegetable fiber as a-filler for varying the density of the mass, or colophonium if used as a filler in combination with the kieselguhr' with or without the asbestos, produces material shaped for various uses and obviously a coloring matter may be introduced to give the desired. shade.

In addition to making the material in the manner stated herein, I may produce an arti'cle of commerce consisting of a composition of matter in the form of a powder, which maybe shipped and handled in such form. and afterward mixed with the water and carbon bi-sulfid or both to form the 'plastic material adapted for building material,

pavements 'and inslde and outside trimmings or the ingredients maybe combined and as heretofore molded into any desired shape, stated.

7 While 'I have, in a general way, stated the ingredients and the process of carrying out the invention, have found that the best results are attained by combining the in-.

gredients in the proportions substantially as follows, viz: magnesium oxid, 40 parts;

carbonate of barium, 3 parts; magnesium I claim-'- sulfate, 10 parts; colophonium, 2 parts; The herein described magnesium cement kieselguhr, 10 parts; salt, 5 parts; fibrous, consisting of magnesium oxid, colophonium, 10 material, 30 parts, and Water andvcarbon magnesium sulfate, salt, kieselguhr, carbon- 5 bi-sulfid sufficient to render the composition ate of barium, fiber, carbon bi sulfid anol plastic, although these proportions may be Water. I modified to suit particular requirements. LLIAM G. F. SIEG-MANN. 

